Mathematics (9th Grade)
Subtracting polynomials
What is the result of subtracting (2x^4 + 3x^2 + 5) from (5x^4 + 2x^2 + 7)?
3x^4 - x^2 + 2
3x^4 + x^2 + 2
3x^4 + x^2 + 12
3x^4 + x^2 - 2